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<BODY bgcolor=#F0F0F0 text=#000000 link=#0000ff vlink=#C000C0 alink=#ff0000><A NAME=top></A>
<h5><a href="https://github.com/urbanjost/M_strings">[UP]</a></h5>
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<CENTER>
<H1><HR><I>Manual Reference Pages &nbsp;-&nbsp;</I><NOBR>unquote (3m_strings)</NOBR><HR></H1>
</CENTER>
<A name=0>

     <H3>NAME</H3>

</A>
<BLOCKQUOTE>
<B>unquote</B>(3f) - [M_strings:QUOTES] remove quotes from string as if
read with list-directed input
(LICENSE:PD)
<P>
</BLOCKQUOTE>
<A name=contents></A><H3>CONTENTS</H3></A>
<BLOCKQUOTE>
<A HREF=#1>Synopsis</A><BR>
<A HREF=#2>Description</A><BR>
<A HREF=#3>Options</A><BR>
<A HREF=#4>Result</A><BR>
<A HREF=#5>Example</A><BR>
<A HREF=#6>Author</A><BR>
<A HREF=#7>License</A><BR>
</BLOCKQUOTE>
<A name=8>

     <H3>SYNOPSIS</H3>

</A>
<BLOCKQUOTE>
function <B>unquote</B>(quoted_str,esc) result (<I>unquoted_str</I>)
<P>
<PRE>
   character(len=*),intent(in)          :: quoted_str
   character(len=1),optional,intent(in) :: esc
   character(len=:),allocatable         :: unquoted_str
<P>
</PRE>
</BLOCKQUOTE>
<A name=2>

     <H3>DESCRIPTION</H3>

</A>
<BLOCKQUOTE>
Remove quotes from a CHARACTER variable as if it was read using
list-directed input. This is particularly useful for processing
tokens read from input such as CSV files.
<P>
Fortran can now read using list-directed input from an internal file,
which should handle quoted strings, but list-directed input does not
support escape characters, which <B>UNQUOTE</B>(3f) does.
</BLOCKQUOTE>
<A name=3>

     <H3>OPTIONS</H3>

</A>
<BLOCKQUOTE>
<TABLE cellpadding=3>
<TR valign=top><TD colspan=2>
<B>quoted_str</B> </TD></TR><TR valign=top><TD width=6%>&nbsp;</TD><TD>
input string to remove quotes from, using the rules of
list-directed input (two adjacent quotes inside a quoted
region are replaced by a single quote, a single quote or
double quote is selected as the delimiter based on which
is encountered first going from left to right, &#46;&#46;&#46;)
</TD></TR>
<TR valign=top><TD width=6% nowrap>
<B>esc</B> </TD><TD valign=bottom>
optional character used to protect the next quote
character from being processed as a quote, but simply as
a plain character.
</TD></TR>
<TR></TR></TABLE></BLOCKQUOTE>
<A name=4>

     <H3>RESULT</H3>

</A>
<BLOCKQUOTE>
<TABLE cellpadding=3>
<TR valign=top><TD colspan=2>
<B></B><I>unquoted_str</I> </TD></TR><TR valign=top><TD width=6%>&nbsp;</TD><TD>
The output string, which is based on removing quotes
from quoted_str.
</TD></TR>
<TR></TR></TABLE></BLOCKQUOTE>
<A name=5>

     <H3>EXAMPLE</H3>

</A>
<BLOCKQUOTE>
Sample program:
<P>
<PRE>
   program demo_unquote
      use M_strings, only : unquote
      implicit none
      character(len=128)           :: quoted_str
      character(len=:),allocatable :: unquoted_str
      character(len=1),parameter   :: esc=&#146;#146;
      character(len=1024)          :: msg
      integer                      :: ios
      character(len=1024)          :: dummy
      do
         write(*,&#146;(a)&#146;,advance=&#146;no&#146;)&#146;Enter test string:&#146;
         read(*,&#146;(a)&#146;,iostat=ios,iomsg=msg)quoted_str
         if(ios.ne.0)then
            write(*,*)trim(msg)
            exit
         endif
<P>
         ! the original string
         write(*,&#146;(a)&#146;)&#146;QUOTED       [&#146;//trim(quoted_str)//&#146;]&#146;
<P>
         ! the string processed by unquote(3f)
         unquoted_str=unquote(trim(quoted_str),esc)
         write(*,&#146;(a)&#146;)&#146;UNQUOTED     [&#146;//unquoted_str//&#146;]&#146;
<P>
         ! read the string list-directed to compare the results
         read(quoted_str,*,iostat=ios,iomsg=msg)dummy
         if(ios.ne.0)then
            write(*,*)trim(msg)
         else
            write(*,&#146;(a)&#146;)&#146;LIST DIRECTED[&#146;//trim(dummy)//&#146;]&#146;
         endif
      enddo
   end program demo_unquote
<P>
</PRE>
</BLOCKQUOTE>
<A name=6>

     <H3>AUTHOR</H3>

</A>
<BLOCKQUOTE>
John S. Urban
</BLOCKQUOTE>
<A name=7>

     <H3>LICENSE</H3>

</A>
<BLOCKQUOTE>
Public Domain
</BLOCKQUOTE>
<P><HR>
<TABLE width=100%><TR> <TD width=33%><I>Nemo Release 3.1</I></TD> <TD width=33% align=center>unquote (3m_strings)</TD> <TD align=right width=33%><I>April 30, 2022</I></TD> </TR></TABLE><FONT SIZE=-1>Generated by <A HREF="http://www.squarebox.co.uk/download/manServer.shtml">manServer 1.08</A> from 40200f16-ff3a-4c05-afd9-e25cb393acc3 using man macros.</FONT>
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